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Dynamic pull-in instability of electrostatically actuated beams incorporating Casimir and van der Waals forces

Moghimi-Zand, M ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1243/09544062JMES1716
  3. Publisher: 2010
  4. Abstract:
  5. In this study, influences of intermolecular forces on the dynamic pull-in instability of electrostatically actuated beams are investigated. The effects of midplane stretching, electrostatic actuation, fringing fields, and intermolecular forces are considered. The boundary conditions of the beams are clamped-free and clamped-clamped. A finite-element model is developed to discretize the governing equations, and Newmark time discretization is then employed to solve the discretized equations. The static pull-in instability is investigated to validate the model. Finally, dynamic pull-in instability of cantilevers and double-clamped beams are studied considering the Casimir and van der Waals effects. The results indicate that by increasing the Casimir and van der Waals effects, the effect of inertia on pull-in values considerably increases
  6. Keywords:
  7. Casimir force ; Dynamic pull-in instability ; Finite-element method ; Microelectromechanical systems ; Nanoelectromechanical systems ; Non-linearity ; Van der Waals force ; Casimir force ; Micro electro mechanical system ; Nano electromechanical systems ; Non-Linearity ; Van der waals ; Chemical bonds ; Composite micromechanics ; Electrostatic actuators ; Finite element method ; Linearization ; Mechatronics ; MEMS ; Microelectromechanical devices ; NEMS ; Quantum theory ; Stability ; Switching systems ; Van der Waals forces
  8. Source: Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science ; Volume 224, Issue 9 , 2010 , Pages 2037-2047 ; 09544062 (ISSN)
  9. URL: http://journals.sagepub.com/doi/pdf/10.1243/09544062JMES1716